Home / 28,353.72-39,127.50-15,779.64

Finding the Fourth Proportional to 28,353.72, 39,127.50 and 15,779.64

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Solution

The fourth proportional to 28,353.72, 39,127.50 and 15,779.64 is: 21,775.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,353.72 : 39,127.50 = 15,779.64 : x
  2. Step 2: Convert to fraction form
    28,353.72/39,127.50 = 15,779.64/x
  3. Step 3: Cross multiply
    28,353.72x = 39,127.50 × 15,779.64
  4. Step 4: Simplify right side
    28,353.72x = 617,417,864.10
  5. Step 5: Solve for x
    x = 617,417,864.10/28,353.72
  6. Step 6: Final answer
    x = 21,775.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.